Pulley



momen" G. F. WINKLBR. PULLBY.

No. MaQ/o.l Parte-md Jan. 5, 1892.

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UNITED STATES kPATENT FFICE.

CHARLES F. \VINKLER,'OF TROY, NENV YORK.

PULLEY.

SPECIFICATION forming part of Letters Patent No. 466,390, dated January 5, 1892.

Application iiled March 2,1891. Serial No. 383,410. (No model.) I

.To a/ZZ whom t may concern.-

Be it known that I, CHARLES F. WINKLER, a citizen of the United States, residing in Troy, in the county of .Rensselaer and State of New York, have invented certain new and -useful Improvements in Pulleys, of which pulleys adapted for use in the transmission of power by ropes or cables.

The object of the invention is to provide Y pulley of peculiar construction which is y"adapted to receive cables of dilferent sizes.

Another object is the construction 0E a pulleyfupon which a plurality of cables may be space. Y l Th'feji'details of the invention will now be described with reference to the accompany-` ing drawings', in whichi Figure lfrepresents a side View ot' the pulley; Fig. 2, an edge view of the same, the rims being shown in dotted lines Fig. 3, a diametrical section of the pulley; Fig. 4, a section of the rims, showing,r the-pulley in elevation;

and Fig. 5 represents a side view of a portion of the inner walls of the groove.

a .represents the hub, a the spokes, and a2 a ring or cylinder carried by the spokes.

This structure is made in the ordinary way bolts securing the rims in place are passed.'

The rim as a whole is an annulus provided with a serpentine groove, formed by alternately-placed swells or lugs c cast upon the opposite sides of a straight groove-that is to say, a swell located upon one side of the groove stands opposite the space between two swells on the other side of the groove, thus making a delection in the groove at this point. The groove therefore consists of aseries of these deflections rst in one direction and then in the other around the pulley.

I have found by experiment that the fabrication of rims constructed as above described is an expensive process by the ordinary methods of casting, and this invention comprehends a method of casting or forming the vrims which is very cheap and simple. In carrying out this method certain precautions against lwarping and destruction in the mold are necessary, and these will be mentioned in the description following. Instead of making veach half-rim consists of a base portion c of continuous thickness and swells c', placed a Aslight distance apart, leaving thinpl'aces c2 between the swells. Now in the process of casting'l have found that these thin places c2 would cool more rapidly than the thicker places c of the rim, and consequently I hollowed out the backs ofthe thicker places, leaving the total cross-section through the swells substantially equal to that through the spaces between the swells. In this'way the whole rim cooled equally, and breaking and warping were prevented. At c3 in Fig. l I have shown lugs or projections located in the hollow spaces back of the swells. This additional amount of metal is provided for in apportioning the distribution of metal around the rim. When the two parts of the rim are put together to form a complete rim, they are placed face to face 'and turned upon each' other until the swells alternate with one another on the opposite sides of the groove. They are then placed upon a cylinder a2 and secured together and to the cylinder by means of bolts c4. As will be seen, therefore, the pulley consists of a cylinder having a rim or radial flange a3 and asupplementary rim constructed of two annular parts iitted to the cylinder, each of said parts having its face inclined or beveled on one side, whereby one of the parts, in connection with another facing it, constitutes a complete grooved rim.

Besides splitting the parts a a a2 of the pulley, as hereinbefore described, I prefer to.

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split the two portions of the rim and bring the abutting ends of the sections of the halfrims together ninety degrees apart, thus forming lap-joints, as illustrated in Fig. 1. This construction makes a strong pulley when together.

In Fig. 3 l have illustrated the parts 0E the rims separated and the gap at the base of the groove filled in with packing material e. This is done to accommodate a large-sized cable, which would not enter the groove when the parts of the rim were together. `rIhe parts of the rim may be separated by loosening the nuts on the bolts c4.

In Fig. 4 I show two complete rims mounted upon one cylinder a2. They are held in place by long bolts c4 and are bound close together. By putting the rims upon the cylinder in this way I am able to bring their centers nearer together than if the rims were carried by separate pulleys having their own hubs and spokes.

This pulley is admirably adapted for the transmission of power through a wire rope. A pulley having a serpentine groove in its periphery, I am aware, is not new; but the same has never been successful commercially, owing to the fact that no Way of constructing the pulley in au economical manner has ever been devised. It will be observed that my invention overcomes this ditiiculty, and theretore provides for the extensive use of the pulle SVTThe lugs c3 hereinbefore mentioned are for the purpose of providing a bearing for plugs c5, of tough material, such as rawhide or wood. These plugs extend through cavities in the lugs and are Hush with the Working faces of the swells. They take the wear caused by the cable.

Having thus described my invention, I claim- 1. A pulley consisting of a cylinder' having a rim, asupplementary rim constructed in two annular parts fitted to said cylinder and each of said parts having its face inclined, whereby the two parts constitute a grooved rim, and a packing or spacing ring also fitted to the cylinder between the bases of the parts of the supplementary rim, and means for securing the two parts of the rim and the ring to the cylinder, substantially as described.

2. A pulley consisting of a cylinder having a radial flange, a plurality of supplementary half-rims fitted to said cylinder and adapted to be secured thereto at different distances along its length, each of said half-rims being beveled or inclined on one side, whereby it, in connection with another rixn facing it, will constitute a complete grooved rim, and bolts extending through the said iange and halfrms for securing said halfrims to the cylinder, substantially as described.

3. A pulley consisting of a cylinder having an annular radial fiange, a plurality of supplementary half-rims fitted to said cylinder and each having alternate inclined swells and depressions on one side,whereby it, in connection with another rim facing it, will form a coinplete serpentine grooved rim, and bolts extending through the flange and supplementary half-rims for securing the latter in position, substantially as described.

In Witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

CHARLES F. WINKLER.

Witnesses:

IIERBUT S. HARP, EUGENE L. MERCHANT. 

